CN109794163A - A kind of burned-coal fly ash is modified to remove SO in flue gas3System and working method - Google Patents
A kind of burned-coal fly ash is modified to remove SO in flue gas3System and working method Download PDFInfo
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- CN109794163A CN109794163A CN201910108167.2A CN201910108167A CN109794163A CN 109794163 A CN109794163 A CN 109794163A CN 201910108167 A CN201910108167 A CN 201910108167A CN 109794163 A CN109794163 A CN 109794163A
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- modified
- deduster
- flying dust
- flue gas
- air preheater
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The present invention relates to SO in a kind of modified removing flue gas of burned-coal fly ash3System and working method, belong to industrial waste gas purifying environmental protection and energy field.Including boiler, economizer, SCR denitration reaction device, air preheater, deduster, supersonic atomizer and modified flying dust injection apparatus；Boiler, economizer, SCR denitration reaction device, air preheater and deduster are sequentially communicated, and modified flying dust injection apparatus is arranged between SCR denitration reaction device and air preheater, and/or, modified flying dust injection apparatus is arranged between air preheater and deduster；Supersonic atomizer is connect with deduster and modified flying dust injection apparatus simultaneously.Then the present invention is sprayed by using modifier modification burned-coal fly ash to removing SO in flue gas in flue3Integrated technique, can be realized the treatment of wastes with processes of wastes against one another, recycle, the purpose of save the cost, applicability is all had to newly constructed boiler or active service boiler, there is good environmental protection, economic benefit and broad application prospect.
Description
Technical field
The invention belongs to industrial waste gas purifying environmental protection and energy field, in particular to a kind of modified removing flue gas of burned-coal fly ash
Middle SO3System and working method.
Background technique
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas pollutant
Discharge is an important process of China's control atmosphere pollution.It is required comprehensively in current coal-burning power plant's routine flue gas pollutant ultralow
Under the situation of discharge, SO3Discharge increasingly causes each side to pay attention to, carries out to it since control means shortage, harmfulness are big
Emission control is imperative.
Enter the flue gas SO of industrial application at present3Removing sulfuldioxide includes alkaline absorbent injection, low temperature electric precipitator, wet
Formula electric precipitator etc., wherein alkaline absorbent spraying technique due to initial cost is low, removal efficiency is high, have a wide range of application the advantages that,
It is widely regarded as flue gas SO3The important development direction of removing sulfuldioxide.It include at present calcium base, sodium for the alkaline absorbent of selection
Base, magnesium-based, amino etc., but generally existing engineer application higher cost, absorbent waste serious and exhaust gas dust specific resistance liter
Height influences the problem of subsequent ESP Efficiency.
Burned-coal fly ash specific surface area with higher itself is the ideal material as adsorbent, and this technology team is opened
The abundant experimental results of exhibition show the specific surface area that flying dust can be further increased using the modified burned-coal fly ash of NaOH solution and its
To SO3Adsorption capacity, and generate sodium salt can be effectively reduced fly ash resistivity, improve subsequent electric precipitator flying dust removing
Performance.
Based on above-mentioned situation and status, the present invention proposes then to spray by the modified burned-coal fly ash of NaOH solution to flue
SO in interior removing flue gas3Integrated technique, can be realized the treatment of wastes with processes of wastes against one another, recycle, the purpose of save the cost, for protection
Environment is of great significance.
Patent related to the present invention, such as 104857841 A of CN --- a kind of " device for removing sulfur trioxide in flue gas
And method ", it is to realize SO in removing flue gas by spraying into strong basicity absorbent in the flue before SCR denitration reaction device3Mesh
's.But there are high SO for the method3Removal efficiency requires lower absorbent consumption larger, and excess absorbent be easy to cause SCR catalyst
Alkalosis influences the problems such as dust specific resistance.
For another example 103055684 B of CN --- " device and technique of sulfur trioxide in flue gas are effectively removed using trona " is
Nozzle system is set at the flue between SCR reactor tail portion and air preheater, trona slurries are sprayed into flue, is utilized
The highly basic characteristic of trona is to SO3Absorbing and removing is carried out, but still there is a problem of what absorbent cost was difficult to control.
Summary of the invention
The purpose of the present invention is be directed to coal-fired flue-gas SO3The problem of emission control, proposes a kind of modified removing of burned-coal fly ash
SO in flue gas3System and working method.
Technical solution used by the present invention solves the above problems is: a kind of burned-coal fly ash is modified to remove SO in flue gas3's
System, which is characterized in that including boiler, economizer, SCR denitration reaction device, air preheater, deduster, supersonic atomizer and
Modified flying dust injection apparatus；The boiler, economizer, SCR denitration reaction device, air preheater and deduster are sequentially communicated, described to change
Property flying dust injection apparatus be arranged between SCR denitration reaction device and air preheater, and/or, modified flying dust injection apparatus is arranged in sky
Between pre- device and deduster；The supersonic atomizer is connect with deduster and modified flying dust injection apparatus simultaneously.
Furthermore, the deduster is sack cleaner, and when work, modified flying dust forms filter cake in filter bag outer surface
Layer, to effectively play SO3Suction-operated.
Furthermore, the supersonic atomizer is connected to the ash bucket of deduster.
SO in the modified removing flue gas of the burned-coal fly ash3System working method it is as follows: flue gas from boiler come out after,
Successively pass through economizer, SCR denitration reaction device, air preheater and deduster, subsequently into tail flue gas processing unit；In this process
In, the fly ash carry in dust collector ash hopper is sprayed to flue by compressed air, flying dust passes through ultrasound during transportation
Wave atomising device, and react and be modified under ultrasonic atomization environment with modifying agent；Modified flying dust passes through modified flying dust injection
Device sprays into flue gas the SO adsorbed in flue gas3, and cake layer is formed in filter bag of dust collector outer surface, to effectively play SO3
Suction-operated eventually enters into dust collector ash hopper and is removed, to realize SO in removing flue gas3Purpose.
Furthermore, the modifying agent uses the NaOH solution of 1~3mol/L, the mass ratio control of modifying agent and flying dust
System is between 0.2~0.5, NaOH dosage and quasi- removing SO3Molar ratio controls between 2~10.
Furthermore, modified flying dust is preferentially sprayed to the flue between SCR denitration reaction device and air preheater, to improve
The flying dust residence time, while being effectively improved air preheater and boiler flue corrosion blocking.
Compared with prior art, the present invention having the following advantages that and effect: can be realized SO in flue gas3Efficient removal,
It realizes waste treatment and waste, recycle simultaneously, the purpose of save the cost, applicability is all had to newly constructed boiler or active service boiler, having
There are good environmental protection, economic benefit and broad application prospect.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
In figure: boiler 1, SCR denitration reaction device 3, air preheater 4, deduster 5, supersonic atomizer 6, changes economizer 2
Property flying dust injection apparatus 7.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1, SO in the modified removing flue gas of burned-coal fly ash in the present embodiment3System, including boiler 1, economizer
2, SCR denitration reaction device 3, air preheater 4, deduster 5, supersonic atomizer 6 and modified flying dust injection apparatus 7；
Boiler 1, economizer 2, SCR denitration reaction device 3, air preheater 4 and deduster 5 are sequentially communicated, modified 7 cloth of flying dust injection apparatus
It sets between SCR denitration reaction device 3 and air preheater 4, and/or, modified flying dust injection apparatus 7 is arranged in air preheater 4 and deduster 5
Between；Supersonic atomizer 6 is connect with deduster 5 and modified flying dust injection apparatus 7 simultaneously.
Deduster 5 is sack cleaner, and when work, modified flying dust forms cake layer in filter bag outer surface, to effectively send out
Wave SO3Suction-operated.
Supersonic atomizer 6 is connected to the ash bucket of deduster 5.
SO in the modified removing flue gas of burned-coal fly ash3System working method it is as follows: flue gas from boiler 1 come out after, successively
By economizer 2, SCR denitration reaction device 3, air preheater 4 and deduster 5, subsequently into tail flue gas processing unit；In this process
In, the fly ash carry in 5 ash bucket of deduster is sprayed to flue by compressed air, flying dust passes through ultrasound during transportation
Wave atomising device 6, and react and be modified under ultrasonic atomization environment with modifying agent；Modified flying dust passes through modified flying dust injection
Device 7 sprays into flue gas the SO adsorbed in flue gas3, and cake layer is formed in 5 filter bag outer surface of deduster, to effectively play SO3
Suction-operated eventually enters into 5 ash bucket of deduster and is removed, to realize SO in removing flue gas3Purpose.
Modifying agent uses the NaOH solution of 1~3mol/L, and the mass ratio of modifying agent and flying dust controls between 0.2~0.5,
NaOH dosage and quasi- removing SO3Molar ratio controls between 2~10.
Modified flying dust is preferentially sprayed to the flue between SCR denitration reaction device 3 and air preheater 4, to improve flying dust stop
Time, while being effectively improved air preheater 4 and boiler flue corrosion blocking.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (6)
1. SO in a kind of modified removing flue gas of burned-coal fly ash3System, which is characterized in that including boiler (1), economizer (2),
SCR denitration reaction device (3), air preheater (4), deduster (5), supersonic atomizer (6) and modification flying dust injection apparatus (7)；
The boiler (1), economizer (2), SCR denitration reaction device (3), air preheater (4) and deduster (5) are sequentially communicated, the modification
Flying dust injection apparatus (7) is arranged between SCR denitration reaction device (3) and air preheater (4), and/or, modified flying dust injection apparatus
(7) it is arranged between air preheater (4) and deduster (5)；The supersonic atomizer (6) simultaneously with deduster (5) and modified
Flying dust injection apparatus (7) connection.
2. SO in the modified removing flue gas of burned-coal fly ash according to claim 13System, which is characterized in that the deduster
It (5) is sack cleaner, when work, modified flying dust forms cake layer in filter bag outer surface, to effectively play SO3Absorption is made
With.
3. SO in the modified removing flue gas of burned-coal fly ash according to claim 13System, which is characterized in that the ultrasonic wave
Atomising device (6) is connected to the ash bucket of deduster (5).
4. SO in a kind of modified removing flue gas of burned-coal fly ash as claimed in any one of claims 1-33System work side
Method, which is characterized in that the working method is as follows: after flue gas comes out from boiler (1), successively pass through economizer (2), SCR denitration
Reactor (3), air preheater (4) and deduster (5), subsequently into tail flue gas processing unit；In the process, empty by compression
Gas sprays the fly ash carry in deduster (5) ash bucket to flue, and flying dust passes through supersonic atomizer during transportation
(6), it and reacts and is modified under ultrasonic atomization environment with modifying agent；Modified flying dust passes through modified flying dust injection apparatus (7)
The SO adsorbed in flue gas is sprayed into flue gas3, and cake layer is formed in deduster (5) filter bag outer surface, to effectively play SO3It inhales
Attached effect eventually enters into deduster (5) ash bucket and is removed, to realize SO in removing flue gas3Purpose.
5. SO in the modified removing flue gas of burned-coal fly ash according to claim 43System working method, which is characterized in that
The modifying agent uses the NaOH solution of 1~3mol/L, and the mass ratio of modifying agent and flying dust controls between 0.2~0.5,
NaOH dosage and quasi- removing SO3Molar ratio controls between 2~10.
6. SO in the modified removing flue gas of burned-coal fly ash according to claim 43System working method, which is characterized in that
Modified flying dust is preferentially sprayed to the flue between SCR denitration reaction device (3) and air preheater (4), to improve the flying dust residence time,
It is effectively improved air preheater (4) and boiler flue corrosion blocking simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910108167.2A CN109794163A (en) | 2019-02-02 | 2019-02-02 | A kind of burned-coal fly ash is modified to remove SO in flue gas3System and working method |
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| CN201910108167.2A CN109794163A (en) | 2019-02-02 | 2019-02-02 | A kind of burned-coal fly ash is modified to remove SO in flue gas3System and working method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404378A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of Multifunctional smoke SO3Remove experimental rig and its working method |
| CN110813026A (en) * | 2019-11-01 | 2020-02-21 | 华电电力科学研究院有限公司 | Flue gas SO with base injection and multi-stage humidification3Removal method |
| CN110975590A (en) * | 2019-12-10 | 2020-04-10 | 华北电力大学 | Coal-fired system and method for removing sulfur trioxide and mercury by using modified fly ash |
| CN111111421A (en) * | 2019-12-16 | 2020-05-08 | 山东电力工程咨询院有限公司 | Device and method for improving utilization rate of absorbent in sulfur trioxide removal process |
| CN112169560A (en) * | 2020-09-22 | 2021-01-05 | 西安热工研究院有限公司 | Semi-dry flue gas denitration method |
| CN112191094A (en) * | 2020-08-20 | 2021-01-08 | 江苏方天电力技术有限公司 | System and method for removing sulfur trioxide in flue gas by recycling fly ash of coal-fired power plant |
| CN112354336A (en) * | 2020-09-15 | 2021-02-12 | 山东莱顿能源技术有限公司 | Method for preparing desulfurizer and denitrifier from unburned carbon and application |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07284633A (en) * | 1994-04-20 | 1995-10-31 | Hitachi Zosen Corp | Treatment of waste combustion gas and collected ash |
| CN101062461A (en) * | 2007-04-27 | 2007-10-31 | 南京师范大学 | Method and system for combinablenably removing SO2, NOx and Hg in coal smoke gas by using recombustion of biomass |
| CN102019142A (en) * | 2009-09-18 | 2011-04-20 | 三菱重工环境·化学工程株式会社 | Exhaust treatment method |
| CN202224058U (en) * | 2011-07-30 | 2012-05-23 | 华电电力科学研究院 | Desulfurization and dust removal device for sprayed supersaturation water quicklime powder |
| TWM475562U (en) * | 2013-11-26 | 2014-04-01 | Tong Tie Environmental Protect Technology Co Ltd | Incinerating apparatus of fly ash on-line reusing |
| CN103958410A (en) * | 2011-08-10 | 2014-07-30 | 爱斯科姆控股Soc有限公司 | Ultrasonic synthesis of zeolites from fly ash |
| CN105983297A (en) * | 2015-02-09 | 2016-10-05 | 华北电力大学 | Coal-fired power plant fly ash adsorbent integral modification and injection mercury-removing system |
| CN210171211U (en) * | 2019-02-02 | 2020-03-24 | 华电电力科学研究院有限公司 | Modification and removal of SO in flue gas by using fly ash of fire coal3Of (2) a |
-
2019
- 2019-02-02 CN CN201910108167.2A patent/CN109794163A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07284633A (en) * | 1994-04-20 | 1995-10-31 | Hitachi Zosen Corp | Treatment of waste combustion gas and collected ash |
| CN101062461A (en) * | 2007-04-27 | 2007-10-31 | 南京师范大学 | Method and system for combinablenably removing SO2, NOx and Hg in coal smoke gas by using recombustion of biomass |
| CN102019142A (en) * | 2009-09-18 | 2011-04-20 | 三菱重工环境·化学工程株式会社 | Exhaust treatment method |
| CN202224058U (en) * | 2011-07-30 | 2012-05-23 | 华电电力科学研究院 | Desulfurization and dust removal device for sprayed supersaturation water quicklime powder |
| CN103958410A (en) * | 2011-08-10 | 2014-07-30 | 爱斯科姆控股Soc有限公司 | Ultrasonic synthesis of zeolites from fly ash |
| TWM475562U (en) * | 2013-11-26 | 2014-04-01 | Tong Tie Environmental Protect Technology Co Ltd | Incinerating apparatus of fly ash on-line reusing |
| CN105983297A (en) * | 2015-02-09 | 2016-10-05 | 华北电力大学 | Coal-fired power plant fly ash adsorbent integral modification and injection mercury-removing system |
| CN210171211U (en) * | 2019-02-02 | 2020-03-24 | 华电电力科学研究院有限公司 | Modification and removal of SO in flue gas by using fly ash of fire coal3Of (2) a |
Non-Patent Citations (1)
| Title |
|---|
| 陈昆柏等, 河南科学技术出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404378A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of Multifunctional smoke SO3Remove experimental rig and its working method |
| CN110404378B (en) * | 2019-07-12 | 2023-07-07 | 华电电力科学研究院有限公司 | Multifunctional flue gas SO 3 Removal test device and working method thereof |
| CN110813026A (en) * | 2019-11-01 | 2020-02-21 | 华电电力科学研究院有限公司 | Flue gas SO with base injection and multi-stage humidification3Removal method |
| CN110975590A (en) * | 2019-12-10 | 2020-04-10 | 华北电力大学 | Coal-fired system and method for removing sulfur trioxide and mercury by using modified fly ash |
| CN111111421A (en) * | 2019-12-16 | 2020-05-08 | 山东电力工程咨询院有限公司 | Device and method for improving utilization rate of absorbent in sulfur trioxide removal process |
| CN112191094A (en) * | 2020-08-20 | 2021-01-08 | 江苏方天电力技术有限公司 | System and method for removing sulfur trioxide in flue gas by recycling fly ash of coal-fired power plant |
| CN112354336A (en) * | 2020-09-15 | 2021-02-12 | 山东莱顿能源技术有限公司 | Method for preparing desulfurizer and denitrifier from unburned carbon and application |
| CN112169560A (en) * | 2020-09-22 | 2021-01-05 | 西安热工研究院有限公司 | Semi-dry flue gas denitration method |
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